// Copyright 2013 Tumblr, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package fmt

import (
	"fmt"
)

func FormatBytes(n uint64) string {
	switch {
	case n < 1e3:
		return fmt.Sprintf("%dB", n)
	case n < 1e6:
		return fmt.Sprintf("%dKB", n/1e3)
	case n < 1e9:
		return fmt.Sprintf("%dMB", n/1e6)
	case n < 1e12:
		return fmt.Sprintf("%dGB", n/1e9)
	case n < 1e15:
		return fmt.Sprintf("%dTB", n/1e12)
	default:
		return fmt.Sprintf("%dPB", n/1e15)
	}
}
